From 9e4f5cb76e3d59e5f634a5824732dbd60c4c9812 Mon Sep 17 00:00:00 2001
From: Daniele Varrazzo <daniele.varrazzo@gmail.com>
Date: Thu, 7 Jul 2016 12:05:29 +0100
Subject: [PATCH] Added empty options in setup.cfg

Setuptools removes them from the sdist, see #453
---
 setup.cfg | 15 +++++++--------
 setup.py  |  7 ++++++-
 2 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/setup.cfg b/setup.cfg
index 90a47dd4..0d41934f 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -7,24 +7,23 @@ define=
 
 # "pg_config" is required to locate PostgreSQL headers and libraries needed to
 # build psycopg2. If pg_config is not in the path or is installed under a
-# different name uncomment the following option and set it to the pg_config
-# full path.
-#pg_config=
+# different name set the following option to the pg_config full path.
+pg_config=
 
 # Set to 1 to use Python datetime objects for default date/time representation.
 use_pydatetime=1
 
 # If the build system does not find the mx.DateTime headers, try
-# uncommenting the following line and setting its value to the right path.
-#mx_include_dir=
+# setting its value to the right path.
+mx_include_dir=
 
 # For Windows only:
 # Set to 1 if the PostgreSQL library was built with OpenSSL.
 # Required to link in OpenSSL libraries and dependencies.
 have_ssl=0
 
-# Statically link against the postgresql client library.
-#static_libpq=1
+# Set to 1 to statically link against the postgresql client library.
+static_libpq=0
 
 # Add here eventual extra libraries required to link the module.
-#libraries=
+libraries=
diff --git a/setup.py b/setup.py
index 92178ab0..766f38f5 100644
--- a/setup.py
+++ b/setup.py
@@ -384,6 +384,11 @@ class psycopg_build_ext(build_ext):
 
     def finalize_options(self):
         """Complete the build system configuration."""
+        # An empty option in the setup.cfg causes self.libraries to include
+        # an empty string in the list of libraries
+        if self.libraries is not None and not self.libraries.strip():
+            self.libraries = None
+
         build_ext.finalize_options(self)
 
         pg_config_helper = PostgresConfig(self)
@@ -515,7 +520,7 @@ if parser.has_option('build_ext', 'mx_include_dir'):
     mxincludedir = parser.get('build_ext', 'mx_include_dir')
 else:
     mxincludedir = os.path.join(get_python_inc(plat_specific=1), "mx")
-if os.path.exists(mxincludedir):
+if mxincludedir.strip() and os.path.exists(mxincludedir):
     # Build the support for mx: we will check at runtime if it can be imported
     include_dirs.append(mxincludedir)
     define_macros.append(('HAVE_MXDATETIME', '1'))